Home / 100,612.09-138,836.55-58,173.36

Finding the Fourth Proportional to 100,612.09, 138,836.55 and 58,173.36

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Solution

The fourth proportional to 100,612.09, 138,836.55 and 58,173.36 is: 80,274.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,612.09 : 138,836.55 = 58,173.36 : x
  2. Step 2: Convert to fraction form
    100,612.09/138,836.55 = 58,173.36/x
  3. Step 3: Cross multiply
    100,612.09x = 138,836.55 × 58,173.36
  4. Step 4: Simplify right side
    100,612.09x = 8,076,588,604.31
  5. Step 5: Solve for x
    x = 8,076,588,604.31/100,612.09
  6. Step 6: Final answer
    x = 80,274.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.